• Include these codes as defined in http://hl7.org/fhir/evidence-classifier-code version 📍5.0.0

  Code	Display	Definition
  AllocConcealNotStated	Allocation concealment not stated	Allocation concealment not stated.
  BaselineImbalance	Baseline imbalances	Differences between groups at start of trial may confound or bias the findings.
  COVID19HumanResearch	COVID-19 human data in population, exposure, or outcome	contains human COVID-19 disease in the research data as any variable (population, exposure or outcome).
  COVID19Relevant	COVID-19 relevant (but not specific) article	Not about COVID-19 but relevant to COVID-19 management or understanding.
  COVID19Specific	COVID-19 specific article	About COVID-19.
  Diagnosis	Article about diagnosis	about methods to distinguish having or not having a condition.
  EarlyTrialTermination	Early trial termination	Early trial termination.
  Guideline	Article includes guideline	for clinical practice guidelines.
  NoBlinding	No blinding	No blinding.
  NoITT	No intention-to-treat analysis	No intention-to-treat analysis.
  NotAssessed	Not rated, not assessed	Neither rated as yes nor rated as no.
  NotResearchNotGuideline	Article is neither research nor guideline	for things that are not research reports, research protocols or guidelines.
  OriginalResearch	Article includes original research	such as randomized trial, observational study.
  PreliminaryAnalysis	Preliminary analysis	Preliminary analysis.
  Preprint	Preprint (not final publication)	Results presented in preprint (pre-final publication) form.
  PreventionAndControl	Article about prevention and control	about preventive care and interventions.
  PrognosisPrediction	Article about prognosis or prediction	about predicting risk for something or risk factors for it.
  RatedAsCaseControl	classified as case-control study	classified as case-control study.
  RatedAsComparativeCohort	classified as comparative cohort study (observational)	classified as comparative cohort study (observational).
  RatedAsControlledTrial	classified as nonrandomized controlled trial (experimental)	classified as nonrandomized controlled trial (experimental).
  RatedAsMixedMethods	classified as mixed-methods study	classified as mixed-methods study.
  RatedAsNo	Rated as no, negative, absent, or exclude	Rated as no, negative, absent, or exclude.
  RatedAsOther	classified as other concept (not elsewhere classified)	classified as other concept (not elsewhere classified).
  RatedAsRCT	classified as randomized controlled trial	classified as randomized controlled trial.
  RatedAsUncontrolledSeries	classified as uncontrolled cohort (case series)	classified as uncontrolled cohort (case series).
  RatedAsYes	Rated as yes, affirmative, positive, present, or include
  ResearchProtocol	Article provides protocol without results	for research protocols.
  ResearchSynthesis	Article includes synthesis of research	such as systematic review, meta-analysis, rapid review.
  RiskOfBias	Risk of bias assessment	Risk of bias assessment.
  SubgroupAnalysis	Subgroup analysis	Subgroup analysis.
  Treatment	Article about treatment	about therapeutic interventions.

This value set expansion contains 31 concepts.